PE,全名為Polyethylene,是結(jié)構(gòu)最簡單的高分子有機化合物,當(dāng)今世界應(yīng)用最廣泛的高分子材料,由乙烯聚合而成,根據(jù)密度的不同分為高密度聚乙烯、中密度聚乙烯和低密度聚乙烯。聚乙烯(PE)應(yīng)用:保鮮膜、背心式塑料袋、塑料食品袋、奶瓶、提桶、水壺等。特性:PE比較軟,摸起來有蠟質(zhì)感,與同等塑料相比質(zhì)量比較輕,有一定的透明性,燃燒時火焰呈藍色。
PE材質(zhì)的物品存在于我們的生活及工業(yè)環(huán)境中,例如:使用再生膠與PE制備橡塑共混材料,橡膠制品廠家可以通過在配方中添加軟化劑、填充油等降低黏度,或是使用炭黑等補強劑、填充劑增加黏度,通過試驗獲得一個比較合適的共混時間、溫度參數(shù),提高橡塑共混材料綜合指標(biāo)。在實際生產(chǎn)中,再生膠與PE材料共混工藝過程可以在開煉機、密煉機或擠出機中進行。
在檢測不同PE材料特性上,浙江工業(yè)大學(xué)環(huán)境學(xué)院就應(yīng)用上海凈信JXFSTPRP-24來做PE材料樣品前處理。
這款儀器有四個優(yōu)勢:
優(yōu)勢一:1分鐘內(nèi)完成2×24、2×48、4×96個樣品的研磨,時間更短操作更快!
優(yōu)勢二:可冷凍或常溫研磨
優(yōu)勢三:特殊的三維一體震蕩模式,全方位破碎樣品!
優(yōu)勢四:研磨機工作時不帶吵不帶晃動
實驗地點:浙江工業(yè)大學(xué)環(huán)境學(xué)院
實驗材料和器具:
樣品:不同種類的PE材料
儀器:全自動快速研磨儀(上海凈信JXFSTPRP-24)
配件:鋼罐一套
實驗步驟:
1、將塑料PE粒子直接倒入液氮中冷凍(圖一);
2、將液氮冷凍過后的樣品放入萬能粉碎機內(nèi)初步預(yù)粉碎處理,再倒入液氮內(nèi)冷凍;
3、將預(yù)處理過冷凍的樣品加入到鋼罐內(nèi)(圖二),再放到液氮內(nèi)冷凍若干分鐘;
4、將適配器裝入凈信研磨儀中;
5、設(shè)定運行參數(shù);
6、啟動儀器至研磨程序結(jié)束,重復(fù)步驟3、4、5即可(圖三);
實驗結(jié)果:
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